>>50102442No, adults were. But even if a 16 year old bunny went off to war and died, he still likely would have had 1-2 children since people started reproducing at around puberty in stone-age societies
Europe was no different in the stone age, the average woman would many kids in a lifetime, but not all would survive due to no medical care and dangerous conditions (hunting dangerous animals, tribe warfare, cold winter, disease)
Read about Stone Age societies sometime and their birth rates, it would answer your question